Trying to extract numbers between bounds and counting them

I'm trying to create a function that finds the amount of numbers in a given table that are greater than or equal to 60 and lower than 70, but I can't us the find function. This is what i have for testing at the moment. The result however always comes out as n = 0 only once. It seems like it either doesnt recognise the x values or it doesn't respect the if statement.

x = randi(100,10,1);
disp(x);
n = 0;
for k = x(:,1)  
    if (60 <= x) & (x<70)
            n = n+1;
            disp(n);
    end  
end
disp(n)

The function itself looks like this

function n = mycount(x)
n = 0;
% Put your code here
for k = x(:,1)  
    if (60 <= x) & (x<70)
            n = n+1;
    end  
end
end

Answer 1

[Mohammad Sami]

If you can use logical vectors then you can do it like this

x = randi(100,10,1);
count = sum(x >= 60 & x < 70);

If you have to use the for loop, you need to make correction to your loop.

function n = mycount(x)
n = 0;
% Put your code here
for k = 1:length(x)  
    if x(k) >= 60 & x(k) < 70
            n = n+1;
    end  
end
end

Answer 2

[Tommy]

Currently, your for loop only runs once, during which time k is equal to the entirety of x. By using

for k = x(:,1)'

or just

for k = x'

instead, the loop will run 10 times, and on the ith iteration of the loop, k will equal the ith element of x. You should then compare k, not the entirety of x, to 60 and 70:

if (60 <= k) && (k<70)

Better yet, loop through an array of indices of x, rather than x itself:

for i = 1:numel(x)

and then use those indices to determine which element of x to test during a given iteration:

if (60 <= x(i)) && (x(i) < 70)

So in total:

x = randi(100,10,1);
disp(x);
n = 0;
for i = 1:numel(x)
    if (60 <= x(i)) && (x(i) < 70)
            n = n+1;
            disp(n);
    end  
end
disp(n)